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SUPER LUBE

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... 101. REDUCES WEAR. Reducing friction also explains the manner in which a lubricant reduces wear. ... If they were not lubricated, some of the small peaks ... – PowerPoint PPT presentation

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Title: SUPER LUBE


1
SUPER LUBE UNIVERSITYCLASS 101
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REDUCES WEAR
  • Reducing friction also explains the manner in
    which a lubricant reduces wear. If they were not
    lubricated, some of the small peaks would be
    broken off as one block moves over the other.
    Eventually, this would result in visible wear on
    the blocks. The peaks cannot contact each other
    with lubricant present and wear is reduced
    accordingly.

4
REMOVES HEAT
  • A certain amount of heat is always developed at
    the points of contact between rubbing parts, even
    though they are lubricated. Oil absorbs heat.
    The heat usually passes from the oil, through the
    sides of the oil reservoir, and into the air.
    Super Lube is an excellent heat transfer agent.

5
PROTECTS FROM DIRT
  • Proper use of Super Lube can keep dirt from
    entering a bearing and damaging the smooth
    surfaces. Each time a new addition of grease is
    applied to the bearing, a supply of clean grease
    is forced out the ends to maintain a protective
    seal.

6
PREVENTS RUST
  • Rust is a reaction with unprotected metal
    surfaces that come in contact with air and
    moisture. Super Lube provides a protective
    barrier which blocks the air and moisture from
    contacting the bearing surfaces. Anti-rust and
    anti-corrosion additives in Super Lube further
    enhance the protective qualities even under
    extreme conditions.

7
TRANSMITS POWER
  • Hydraulic equipment uses oil as a medium for
    power transmittal. Super Lube Lightweight Oil
    may be used very effectively in this application.

8
UNDERSTANDING MOVING PARTS OF MACHINES REQUIRING
LUBRICATION
  • We know that lubrication is necessary at all
    points at which one surface moves against
    another. This occurs in bearings, which support
    rotating shafts, in gears, which have meshing
    teeth, and between pistons and the cylinders in
    which they operate. A machine may be large and
    complex in design, but it still has three
    fundamental moving parts, the bearings, gears and
    pistons.

9
BEARINGS
  • There are two main types of bearings, plain and
    antifriction

10
Plain bearings
  • Plain bearings are usually made from bronze,
    Babbitt, plastic, or some other softer than steel
    material so that wear will be on the bearing
    rather than on the steel part rubbing against it.
    Plain bearings are further classified as journal
    or bushing, guide, and thrust bearings. Journals
    or bushings support or operate against a rotating
    shaft. Guide bearings hold reciprocating parts
    in proper position. Reciprocating parts move
    with a back and forth motion. Thrust bearings
    prevent shafts from moving end wise. Most plain
    bearings should be lubricated with Super Lube
    Oil with PTFE.

11
Antifriction bearings
  • Antifriction bearings have a series of rollers or
    balls interposed between the moving parts. These
    rollers or balls are enclosed between rings known
    as races. Since rolling takes place with very
    little friction, these bearings are called
    antifriction bearings.
  • Antifriction bearings are further classified as
    roller, ball, ball thrust, or needle bearings.

12
Roller bearings
  • Roller bearings are further categorized as
    straight roller if the axis of each roller is
    parallel to the axis of the bearing and tapered
    roller if the bearing is used to not only support
    the rotating shaft, but also to prevent the shaft
    from moving endwise. In this respect, it acts as
    a thrust bearing also.

13
Ball Bearings
  • Ball Bearings are as the name implies, a series
    of balls retained between the races by a cage.
    The bearings may be of the open design or
    shielded. Shielded bearings have rubber guards
    on the ends to protect the balls from
    contamination in dirty environments. Most
    shielded bearings are factory lubricated and are
    not serviced in the field.

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  • The ball thrust bearing is similar to the plain
    thrust bearing except that balls are placed
    between the two thrust race faces.
  • The needle bearing differs from the others in
    that it has no inner race and no separator or
    cage, and its small rollers or needles are just
    slightly separated by the lubricant. The name
    comes from the fact that the length of each
    roller is so much greater than its thickness.

15
  • In contrast to plain bearings, which are made of
    materials softer than steel, antifriction
    bearings are made of very hard steel. The roller
    or ball in an antifriction bearing must be very
    hard, since it must carry the entire load,
    whereas the load is spread over a much larger
    area in a plain bearing.

16
GEARS
  • Serve to transmit motion from one shaft to
    another and to vary the turning speeds of the
    various shafts.

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  • A spur gear is a toothed wheel whose teeth
    parallel the shaft or axle. The smaller of the
    two meshing gears is usually called the pinion.
  • Helical gears are similar in shape to spur gears,
    but their teeth are placed at an angle on the
    face of the gear. In meshing, more teeth are in
    contact at one time than in the case of spur
    gears, yielding a smoother operation.
  • Herringbone gears are like having two helical
    gears side by side with teeth inclined in
    opposite directions. They are used when smooth
    operation is desired and to eliminate end thrust
    on a shaft that would be present if only a
    helical gear were used.

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  • A rack and pinion combination is used to produce
    reciprocating motion from rotary motion. Usually
    the rack moves back and forth as the pinion
    rotates one way or the other.
  • Bevel gears are used to transmit motion between
    shafts that are at an angle to each other. The
    straight bevel gear has straight teeth on a
    slanted or beveled working surface. The spiral
    bevel gear has spiral teeth and produces smoother
    operation.

19
  • In the worm gear set, the small element called
    the worm usually drives the large element known
    as the wheel or gear. The shaft of the worm is
    perpendicular to the shaft of the wheel.
  • When gearboxes are enclosed or sealed by a
    housing, they are usually oil filled. When it is
    not practical or possible to seal the gear
    casings, then grease is used as a lubricant.

20
PISTONS
  • Operate in a cylinder and convert the power of
    compressed air, or the combustion of fuel in the
    space above the piston, to drive it down causing
    a crankshaft to turn, or a linear mechanism to
    move. Lubricants help to provide a seal between
    the piston and the cylinder walls. Pistons are
    found in engines, compressors, air or hydraulic
    cylinders, pumps, and pneumatic tools. Pistons
    are usually oil lubricated, but it is becoming
    common now to see permanently lubricated air
    cylinders utilizing a grease.

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METHODS OF APPLYING LUBRICANTS
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OIL
  • Once-through-oiling is so named because the oil
    passes through the bearing only once and is lost
    for further use. Methods of this type include
    hand oiling, drip feed oiling, wick feed oiling,
    misting and force feed lubricators.
  • Hand oiling is the direct application of oil from
    a hand oilcan. It is the most common method and
    is used to lubricate electric motor bearings,
    circulator pumps, hinges and small bearings
    having little movement.

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  • Drip-feed oiling allows a more uniform supply of
    oil to be administered through the use of a shut
    off valve, adjustment, oil chamber, needle valve
    and sight glass. The dripping off of the oil is
    adjustable and visible through the sight glass.
    Air line lubricators are a good example of
    drip-feed oilers.
  • Wick-feed oilers consist of an oil reservoir and
    a wool wick. The wick draws the oil from the
    reservoir and feeds it into an opening in the
    bearing or onto a shaft by direct contact with
    the oil-saturated wick.

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  • Misting utilizes compressed air to atomize oil
    from a reservoir and deliver it as a mist through
    pipes to the bearings or gears.
  • Reservoir oiling uses the same oil over and over
    again. Dipping and carrying the oil from the
    reservoir to the shaft is accomplished by using a
    ring, or collar that rotates on the shaft and
    carries the oil from the sump to the top of the
    shaft where it flows along and around the shaft,
    lubricating the bearings.

25
  • Circulating Oil Systems make use of pumps and
    piping to deliver oil under pressure, and often
    in large quantities, to moving parts. The
    internal combustion engine is an example of a
    circulating oil system.

26
GREASE
  • Grease is a semisolid made by combining base
    lubricating oils with a thickening agent and
    performance enhancing additives. Oils flow of
    their own accord, but pressure must be applied to
    most greases to cause them to move or flow.

27
In general, grease is preferred to oil under the
following conditions
  • When there is no way to retain oil for the parts
    being lubricated. Examples are open gears,
    conveyors, and open guide bearings.
  • When the lubricant must act as a seal to prevent
    the entrance of dirt into a bearing.
  • Where a lubricant is seldom added, as in shielded
    bearings.
  • Where speeds are low and loads are high.

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  • Hand application of grease is most common. It
    can be applied with a brush to open gears or
    conveyors, or by means of a grease gun. The
    grease gun accepts a standard cartridge of grease
    or it can be filled from a bulk container. The
    grease gun mates to a special grease fitting
    located on the equipment to be lubricated.
    Grease is forced under high pressure into the
    fitting by pumping the grease gun handle.

29
  • High-pressure application is also achieved by
    means of semi-automated pumping equipment. This
    is commonly found in automobile repair
    facilities. Air pressure is used to activate the
    grease pump instead of a hand pump.

30
  • Automated assembly lines are often outfitted with
    special grease metering and dispersing heads
    connected through tubing and distribution
    manifolds to a centrally located grease pump.
    Either the assembly equipment itself, or the
    assembled parts, can then be lubricated on a
    continuous or timed interval basis.

31
LUBRICANT CHARACTERISTICS
32
OIL
  • Viscosity is a measure of flow ability at defined
    temperatures. Low viscosity oils, or light oils,
    flow freely. High-viscosity or heavy oils, flow
    slowly. In general, heavy oils are used on parts
    moving at slow speeds under high pressure, since
    the heavy oil resists being squeezed out from
    between the rubbing parts. Light oils are used
    when higher speeds and lower loads are
    encountered, as they do not impose as much drag
    on high-speed parts.

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  • Low temperatures call for light oils and high
    temperatures are more apt to require heavier
    oils, because oils increase in viscosity as their
    temperatures become lower and decrease in
    viscosity as the temperature goes up.
  • Viscosity is expressed in either Saybolt
    Universal Seconds (SUS) or in centistokes (cSt).
    SUS readings are usually referenced at a
    temperature of 100F, and cSt readings at 100C.
    In both methods, when comparing viscosities, a
    higher number indicates a thicker oil.

34
Pour Point
  • Pour Point of oil is the lowest temperature at
    which it will pour, or flow, when chilled without
    disturbance. Even as water loses its fluidity
    and becomes solid at low temperatures, so does
    oil cease to flow. Synthetic oils flow at much
    lower temperatures than do mineral oils. Super
    Lube is a synthetic oil.

35
Oxidation Resistance
  • Oxidation Resistance oil is a complex mixture
    of compounds of hydrogen and carbon called
    hydrocarbons. When hydrocarbons are exposed to
    air and heat, they combine slowly with oxygen in
    the air and are chemically changed into materials
    unsuitable for use as lubricants. The slow
    combination of oil with oxygen is called
    oxidation. Oxidation is hastened in service by
    high temperatures. Anti-oxidants are added to
    lubricants to help retard oxidation. Super Lube
    utilizes antioxidants.

36
Extreme Pressure
  • Extreme Pressure oils are used on gears and
    bearings that operate under extreme loads and
    pressures. With extreme shocks and pressures,
    moving steel parts may break through an ordinary
    oil film and establish steel-to-steel contact.
    The EP (extreme pressure) oils contain added
    ingredients that help prevent metal-to-metal
    contact even if the oil film itself should fail
    to maintain the necessary separation. Super Lube
    utilizes PTFE, the generic form of TEFLON, and
    other food grade additives to enhance the EP
    characteristics.

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GREASE
  • Hardness
  • Dropping Point

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Hardness
  • Hardness sometimes known as consistency or
    penetration is a characteristic that is similar
    in concept to the viscosity of oils. Just as the
    soil in your garden is hard if a spade barely
    penetrates it, and soft if it spades easily, so
    grease hardness is determined and graded
    according to the depth to which a sharp, pointed
    cone will penetrate the grease when dropped from
    a certain height. Grease is graded by the
    National Lubricating Grease Institute (NLGI) from
    a grade 000 (very soft) to a grade 6 (like a
    bar of soap), with a grade 2 as the most common
    (consistency similar to Vaseline).

39
Dropping Point
  • Dropping Point of a grease is the temperature at
    which it passes from a semi solid to a liquid.
    Most calcium soap greases melt in the 160 210F
    range. Sodium soap greases melt in the 275
    350F range, and lithium soap greases melt in the
    350 400 F range. Super Lube has no dropping
    point. It does not melt. It is ideal for high
    temperature applications. In time, at high
    temperatures, Super Lube base oils will dry out
    and the lubricant will resemble a rubbery
    substance. The PTFE will provide continued
    lubrication, but the lubricant should be
    replenished.

40
OIL TESTS
  • Saybolt Universal Viscosity
  • Cloud and Pour Points
  • Flash and Fire Points
  • Falex Lubricant Tester
  • Measurement of Extreme Pressure Properties of
    Oils

41
GREASE TESTS
  • Cone Penetration of Lubricating Grease
  • Dropping Point of Grease
  • Extreme Pressure Properties of Grease
  • Water Washout Test

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